[Intl] Remove skipped tests depend on stable sort

TC39 accept stable sort in Oct 2018

Bug: v8:7808
Change-Id: I2ad1bca62bda10838dc33acb109a5c937a3b1947
Reviewed-on: https://chromium-review.googlesource.com/c/1400401Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#58646}

test/test262/test262.status

@@ -541,12 +541,6 @@
   # https://bugs.chromium.org/p/v8/issues/detail?id=7669
   'intl402/Intl/getCanonicalLocales/canonicalized-tags': [FAIL],
 
-  # Tests assume that the sort order of "same elements" (comparator returns 0)
-  # is deterministic.
-  # https://crbug.com/v8/7808
-  'intl402/String/prototype/localeCompare/returns-same-results-as-Collator': [SKIP],
-  'intl402/Collator/prototype/compare/bound-to-collator-instance': [SKIP],
-
   # https://bugs.chromium.org/p/v8/issues/detail?id=8260
   'intl402/Locale/constructor-non-iana-canon': [FAIL],